Saint Methodius was a 9th-century Christian missionary known for his work in spreading Christianity among the Slavic peoples. Along with his brother, Saint Cyril, he developed the Glagolitic alphabet, which was the first alphabet used to transcribe the Slavic languages. Their efforts helped to translate the Bible and other religious texts, making them accessible to the Slavic population. Methodius became the Archbishop of Moravia and played a crucial role in establishing the Eastern Orthodox Church in the region. He faced opposition from German clergy but remained dedicated to his mission, promoting education and literacy among the Slavs until his death in 885.